Process for converting the webs from the carding engines into fine rovings for spinning



Nov. 1, 1932. G. c. LAURENCY 1,885,271

PROCESS FOR CONVERTING THE WEBS FROM THE CARDIN?! ENGINES INTO FINE ROVINGS FOR SPINNING Original Filed Feb. 21, 1930 Inventor;

Gmiidme Glaareng Mk @Atrm s Patented Nov. 1, 1932 I v UNITED STATE-LS, PATENT- omen rnocnss non convnnrmc THE wans rnoMrHn CARDING enemas rnro FINE novrncsron SPINNING Original application filed February 21 1930, Serial No. 430,386, and in Belgium February 5, i930. Divided and this application filed November 28, 1930. Serial No. 498,533.: 1

This application forms a division of my the fibres will be grouped in rovings'by the application Ser; No. 4,30,386, filed Feb. 21, action of a rake M partly shown at a larger 1930, hereinafter referred to as my said 00- scale in Figs. 3' and The teeth ofsaid pending application; I j rake go up and down very quickly between My invention can be appliedto any actually thefibres- At eachv upward movementthe known type of carding engines for textile points thereof will be inserted between the fibres, and it has forits object to produce by fibres, thus exactly marking the point of means of said cardi'ng engines fine regular separation thereof, and as said teeth continue rovings which can be transformed into thread their upward movement the tapered shape in the spinning machine by drawing thefilathereof will widen the opening by forcing ments without twisting them. However I the fibres laterally to the right and left, so con-template more particularly to use my inthat all the fibres taken between two points of vention with carding engines which produce the teeth will be assembled in groups, said a web of perfectly straight andparallel fibres groups being progressively spaced from each I such as described in my said copending appliother as they will become narrower. The cation, and therefore my invention has also groups of fibres conveyed 'by the roller E to for its object to transform in the spinning the point u will be taken by the roller .F with machine fibres straight from the carding 'envery little acceleration of speed and trans gines. I mitted to the condensing point *0 where they My invention is described with the aid of will be rolled in the known way by the fricw the appended drawing in which: 5 tion of the muffsjG and G. I

' 'Fig. 1 is a longitudinal view partly in sec- A second rake N operates between the tion of the mechanism for grouping the fibres rollers E-F for the purpose of producing into parallel rovings, said mechanism being the separation of the groups of fibres; the mounted in combination with the mechanism amplitude of vertical movement of said rake for stretching the fibres into parallel relation N maybe' i'educed, said rake may even be according to'myv said copending application. held stationary for short fibres, but for long Fig. 2 shows some details of Fig. 1 by an textile fibres vertical or lateral movement of elevational view at 90 to the latter, the rake'is indispensable. Fig. 3 is a front View ofthe teeth of the The points of the teeth on the rake M rakes on an enlarged scale, and should be lowered below the fibresafter each Fig. 4 is a lateral view of the same. downwardmovement', whilstthe teeth on the In Fig. 1 showing a complete grouplng rake N may remain between the-groups of mechanism, A is a part of the comber or fibres. Theteeth'on the rake Mhave ribs doffer of the card, B a section of the roller with hooks p (Figs. 3 and 4t) upon the lowertaking the fibres from the doffer A. D is a ing of theteeth said hooks 12 will cause the roller provided with needles or carding teeth, stray fibres to rejoin the groups'to which they the circumferential speed of which is greater b l ng, Saidrib is ot n a y on di than that of the roller B. This increase of f k N 1 speed causes the needles'or carding teeth on I ti g d mo ti l -1 h 90 D to slide between the fibres held at the point time after the cleaningof the cards it is neces-" n by the roller B. After they r I10 longer sary-to momentarily prevent the action of one held at said point n, said fibres will remain .b th' k M, :N Th mechanism h between the teeth on D and conveyed by the been combined to this end. The rakes are latter to the point 0, where they will be ak secured: at their ends to vertical rods L slidat a still greater speed by the roller E similar able in guides b and raised the action of to the roller 13, the sliding movementof the springsd (Fig. 2). fibres between D and E being efiected in the. Thecrank pulley R fcau'ses the rocking of same way as between A and B. the balance beams e on theishaft f through the 50 While being stretched between D and E agency of connecting rods S and arms g, 1

said rocking movements being transmitted to the vertical rods L by links 9 pivotally connected to pieces it moved upwardly and downwardly at each revolution of the pulley R. The pieces h are adapted to freely slide on the rods L abovethe rings 7L secured to said rods and held against the pieces h by the action of springs (Z if the rakes are to be operated.

Furthermore each of the rods L-has a nose 0" located near a pin tsecured to a cross bar U, the movement of which causes the corre sponding rake to be stopped or operated.

In the position shown in Figs. 1 and 2, the pins 27 are spaced from the noses 1, but if the bar U is pushed towards the right (Fig. 2) the pin will be moved above the nose 7 and prevent the rings A from being moved up- Wardly, whereby the rake will be held at the end of its downward stroke in spite of the action of the springs cZ. Upon the movement of the bar U to its initial position, said rake may again be operated freely.

In the rovings produced by this process the fibres remain parallel as they were in the web of the carding engine, and as these rovings are produced by strips in the web, which strips have a very precise width, exactly equal to the distance between the points of the rakes, they have a very regular crosssection which enables them to be spun in yarns without being twisted. Thisin an ad vantage in comparison to the other processes which involve a complicated machinery to which the rovings are submitted before spinning.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent, is:

1. In machines for preparing textile fibres for spinning, the combination of parallel rollers revolving with successively increased speeds and stretching between them a web of parallelized fibres, and a rake provided with sharp pointed teeth alternately moved in and -'1 out of said web several times during the passage of a fibre, whereby the web is divided and grouped into rovings of parallel fibres and of regular section.

2. In machines for preparing textile fibres for spinning, the combination of parallel rollers revolving with successively increased speeds and stretching between them a web of parallelized fibres, and a rake provided with sharp pointed teeth alternately moved in and out of said web several times during the passage of a fibre, said teeth having saw-like ribs, whereby the web is divided and grouped into distinct rovings of parallel fibres and of regular section.

3. In machines for preparing textile fibres for spinning, the combination of a plurality of parallel rollers revolving with successively increased speeds and stretching between them a web of parallelized fibres, a rake provided with sharp pointed teeth alternately moved 7 roller.

4. In machines for preparing textile fibres for spinning, the combination of a plurality of parallel rollers revolving with successively increased speeds and stretching between them a web of parallelized fibres, a rake provided with sharp pointed teeth alternately moved in and out of the web stretched between the first and the second roller, said teeth having saw-like ribs, a second rake the teeth of which are inserted permanently and moved between the rovings stretched between the second and the third roller and formed by the teeth of the first rake, and a common crank imparting motion to both rakes.

5. In machines for preparing textile fibres for spinning, the combination of a plurality of parallel rollers revolving with successively increased speeds and stretching between them a web of parallelized fibres, a slidably mounted rake provided with sharp pointed teeth adapted to be moved in and out of the web stretched between the first and the second roller, said teeth having saw-like longitudinal ribs, a second slidably mounted rake the teeth of which are adapted to be moved between the rovings stretched between the second and the third roller, a single balance beam, a crank imparting balancing motion to said balance beam, non rigid connections be-' tween'said balance beam and said slidably mounted rakes, whereby said rakes are moved away from the web and rovings, spring means urging said rakes towardssaid web and r0vin gs, and a separate cam means for operating each rake against said spring means whereby the teeth may be maintainedout of said; web and rovings.

GUILLAUME CLEMENT LAURENCY. 

